Title:
METHOD FOR PRODUCING ROLL-TYPE GAS DIFFUSION LAYER HAVING EXCELLENT SPREADING PROPERTY
Document Type and Number:
WIPO Patent Application WO/2018/124581
Kind Code:
A1
Abstract:
In the present invention, a roll-type gas diffusion layer is produced by impregnating carbon paper produced by using a carbon fiber chop having a low modulus of 10 to 100 GPa or less with phenolic resin or the like, carbonizing at 1,800 to 2,400°C, forming a polytetrafluoroethylene resin layer having fine pores on one side among the two sides of the carbonized carbon paper to produce a sheet-like gas diffusion layer, and then winding the produced sheet-like gas diffusion layer on a roll. Since the roll-type gas diffusion layer produced by the present invention is produced from a carbon fiber chop having a low modulus, the gas diffusion layer cut out into a sheet form from the carbon fiber chop was excellent spreading properties for evenly spreading without lifting. Therefore, even if no separate binder is used, sealing between the gas diffusion layer and a fuel cell separating plate is fully achieved thus preventing problems such as leaks and flooding, and it is possible to prevent the electrical conductivity from deteriorating due to the use of the separate binder.
Inventors:
YOON JOON YOUNG (KR)
YONG DA KYOUNG (KR)
YONG DA KYOUNG (KR)
Application Number:
PCT/KR2017/014978
Publication Date:
July 05, 2018
Filing Date:
December 19, 2017
Export Citation:
Assignee:
KOLON INC (KR)
International Classes:
H01M8/0245; D01F9/12; D21H17/48; D21H19/20; D21H25/04; H01M8/0234
Domestic Patent References:
| WO2013147174A1 | 2013-10-03 | |||
| WO2005024981A2 | 2005-03-17 |
Foreign References:
| KR20050116153A | 2005-12-09 | |||
| KR20110128156A | 2011-11-28 | |||
| EP2857355A1 | 2015-04-08 | |||
| KR20050054467A | 2005-06-10 |
Other References:
PENG, S.: "Lyocell Fibers as the Precursor of Carbon Fibers", JOURNAL OF APPLIED POLYMER SCIENCE, vol. 90, no. 7, 17 September 2003 (2003-09-17), pages 1941 - 1947, XP002717568, DOI: doi:10.1002/app.12879
See also references of EP 3565043A4
See also references of EP 3565043A4
Attorney, Agent or Firm:
CHO, Hwal-Rai (KR)
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